text: # coding=utf-8
  # Copyright 2020 The Trax Authors.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  # Lint as: python3
  """A few utilities for tests."""
  
  import sys
  
  from absl import flags
  
  FLAGS = flags.FLAGS
  
  
  # pytest doesn't run the test as a main, so it doesn't parse the flags
  # so if flags are required in tests, this will ensure that flags are manually
  # parsed and the desired flag exists.
  def ensure_flag(flag_str):
    try:
      getattr(FLAGS, flag_str)
    except flags.UnparsedFlagAccessError:
      # Manually parse flags.
      FLAGS(sys.argv)
    finally:
      assert getattr(FLAGS, flag_str)
  